5,8-diamino-6a-methyl-6a,7-dihydro-(5H)pyrimido[4,5,6-de][1,8]naphthyridine-4,9-dicarboxilic acid dihydrochloride 在
氨 作用下,
以
甲醇 为溶剂,
以75%的产率得到5,8-diamino-6a-methyl-6a,7-dihydro-(5H)pyrimido[4,5,6-de][1,8]naphthyridine-4,9-dicarboxilic acid diethyl ester